skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Crystal structure of nonstoichiometric copper-substituted La(Ni[sub 1[minus]z]Cu[sub z])[sub x] compounds studied by neutron and synchrotron anomalous powder diffraction

Abstract

The structural properties of the potential battery electrode materials LaNi[sub 4]Cu, LaNi[sub 4.4]Cu, LaNi[sub 5]Cu, and LaNi[sub 4.5]Cu[sub 1.5] have been investigated by neutron and anomalous synchrotron powder diffraction. The nonstoichiometry of such AB[sub x] (5 [le] x [le] 6) compounds has been described in a structure derived from the hexagonal CaCu[sub 5]-type structure by replacement of the A atoms by dumbbells of B atoms. In these copper-substituted compounds, Cu can occupy any of the four available nickel sites. From a joint refinement procedure using both neutron and synchrotron data, the copper-to-nickel ratio at each B site has been determined. This shows that substitution is not random and that copper occupies some crystallographic sites preferentially. The results are discussed and compared to other substituted AB[sub 5] systems.

Authors:
; ;  [1];  [2]
  1. (CNRS, Thiais (France). Lab. de Chimie Metallurgique des Terres Rares)
  2. (Philips Research Labs., Eindhoven (Netherlands))
Publication Date:
OSTI Identifier:
6117064
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 146:2; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; COPPER ALLOYS; CRYSTAL STRUCTURE; ELECTRIC BATTERIES; EXPERIMENTAL DATA; LANTHANUM ALLOYS; NEUTRON DIFFRACTION; NICKEL ALLOYS; STOICHIOMETRY; X-RAY DIFFRACTION; ALLOYS; COHERENT SCATTERING; DATA; DIFFRACTION; ELECTROCHEMICAL CELLS; INFORMATION; NUMERICAL DATA; RARE EARTH ALLOYS; SCATTERING; 360102* - Metals & Alloys- Structure & Phase Studies; 250903 - Energy Storage- Batteries- Materials, Components, & Auxiliaries

Citation Formats

Latroche, M., Joubert, J.M., Percheron-Guegan, A., and Notten, P.H.L. Crystal structure of nonstoichiometric copper-substituted La(Ni[sub 1[minus]z]Cu[sub z])[sub x] compounds studied by neutron and synchrotron anomalous powder diffraction. United States: N. p., 1999. Web. doi:10.1006/jssc.1999.8348.
Latroche, M., Joubert, J.M., Percheron-Guegan, A., & Notten, P.H.L. Crystal structure of nonstoichiometric copper-substituted La(Ni[sub 1[minus]z]Cu[sub z])[sub x] compounds studied by neutron and synchrotron anomalous powder diffraction. United States. doi:10.1006/jssc.1999.8348.
Latroche, M., Joubert, J.M., Percheron-Guegan, A., and Notten, P.H.L. Wed . "Crystal structure of nonstoichiometric copper-substituted La(Ni[sub 1[minus]z]Cu[sub z])[sub x] compounds studied by neutron and synchrotron anomalous powder diffraction". United States. doi:10.1006/jssc.1999.8348.
@article{osti_6117064,
title = {Crystal structure of nonstoichiometric copper-substituted La(Ni[sub 1[minus]z]Cu[sub z])[sub x] compounds studied by neutron and synchrotron anomalous powder diffraction},
author = {Latroche, M. and Joubert, J.M. and Percheron-Guegan, A. and Notten, P.H.L.},
abstractNote = {The structural properties of the potential battery electrode materials LaNi[sub 4]Cu, LaNi[sub 4.4]Cu, LaNi[sub 5]Cu, and LaNi[sub 4.5]Cu[sub 1.5] have been investigated by neutron and anomalous synchrotron powder diffraction. The nonstoichiometry of such AB[sub x] (5 [le] x [le] 6) compounds has been described in a structure derived from the hexagonal CaCu[sub 5]-type structure by replacement of the A atoms by dumbbells of B atoms. In these copper-substituted compounds, Cu can occupy any of the four available nickel sites. From a joint refinement procedure using both neutron and synchrotron data, the copper-to-nickel ratio at each B site has been determined. This shows that substitution is not random and that copper occupies some crystallographic sites preferentially. The results are discussed and compared to other substituted AB[sub 5] systems.},
doi = {10.1006/jssc.1999.8348},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = 146:2,
place = {United States},
year = {1999},
month = {9}
}